Processing of tar sands

Details Processing of tar sands Processing of tar sands

1983-07-07

1984-01-03

Gantz, Delbert E.

Mineral oils: processes and products

Products and compositions

Lubricating oils

208 8LE, C10G 104

Patent

active

044241135

ABSTRACT:
The present invention relates to an improved process for the recovery of bitumen from tar sands comprising first heating the raw tar sands with steam at a temperature sufficient to visbreak a portion of the bitumen without significant thermal cracking thereby producing a vaporous distillate product mixed with steam and lowering the viscosity and specific gravity of the residual bitumen on the heat treated tar sands. The distillate product and steam are cooled and condensed and mixed with the heat treated tar sands containing residual beneficiated bitumen to form a slurry. Bitumen is then recovered from the slurry by a hot-water separation process.

REFERENCES:
patent: 2911349 (1959-11-01), Coulson
patent: 2980600 (1961-04-01), Kelley
patent: 3530042 (1970-09-01), Graybill et al.
patent: 3594306 (1971-07-01), Dobson
patent: 3850738 (1974-11-01), Stewart et al.
patent: 4005005 (1977-01-01), McCollum et al.
patent: 4036732 (1977-07-01), Irani et al.
patent: 4094767 (1978-06-01), Gifford
patent: 4098674 (1978-07-01), Rammler et al.

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